STANDARD SPECIFICATIONS

Transcription

1 STANDARD SPECIFICATIONS STATE OF CALIFORNIA BUSINESS, TRANSPORTATION AND HOUSING AGENCY DEPARTMENT OF TRANSPORTATION 2010 PUBLISHED BY DEPARTMENT OF TRANSPORTATION Copies of this book may be obtained from: STATE OF CALIFORNIA DEPARTMENT OF TRANSPORTATION PUBLICATION DISTRIBUTION UNIT 1900 ROYAL OAKS DRIVE SACRAMENTO, CALIFORNIA Telephone (916) Fax (916) Publication Unit Web site:

2 4. Apply flush coat if specified The Engineer may order salvaging of excess screenings. Dispose of excess screenings the Engineer determines are not salvageable. Dispose of screenings in any of the following ways or locations: 1. Under section On embankment slopes 3. In authorized areas Salvaging and stockpiling excess screenings is change order work H(2) Reserved I Seal Coat Maintenance Seals coat surfaces must be maintained for 4 consecutive days from the day screenings are applied. Maintenance must include brooming to maintain a surface free of loose screenings, to distribute screenings over the surface so as to absorb any free asphaltic material, to cover any areas deficient in cover coat material, and to prevent formation of corrugations After 4 consecutive days, excess screenings must be removed from the paved areas. Brooming must not displace screenings set in asphaltic material. The exact time of brooming will be determined by the Engineer. As a minimum, brooming will be required at the following times: 1. On 2-lane 2-way roadways, from 2 to 4 hours after traffic, controlled with pilot cars, has been routed on the seal coat 2. On multilane roadways, from 2 to 4 hours after screenings have been placed 3. In addition to previous brooming, immediately before opening any lane to public traffic, not controlled with pilot cars 4. As the 1st order of work on the morning following the application of screenings on any lane that has been open to public traffic not controlled with pilot cars. For 2-lane 2-way roadways under 1-way traffic control, upon completion of secondary rolling, public traffic must be controlled with pilot cars and routed over the new seal coat for a period of 2 to 4 hours. The Engineer will determine the exact period of time. Schedule the operations so that seal coat is placed on both lanes of the traveled way each work shift and so that 1-way traffic control is discontinued 1 hour before darkness. At the end of the work shift, the end of the seal coat on both lanes must generally match. On multilane roadways, initial brooming must begin after the screenings have been in place for a period of 2 to 4 hours. When the initial brooming is not completed during the work shift in which the screenings were placed, the initial brooming must be completed as the 1st order of work at the beginning of the next work shift. Public traffic must be controlled with pilot cars and be routed on the new seal coat surface of the lane for a minimum of 2 hours after completion of the initial brooming and before opening the lane to traffic not controlled with pilot cars. When traffic is controlled with pilot cars, a maximum of 1 lane in the direction of travel must be open to public traffic. Once traffic controlled with pilot cars is routed over the seal coat at a particular location, continuous control must be maintained at that location until the seal coat placement and brooming on adjacent lanes to receive seal coat is completed PAYMENT If there is no bid item for a traffic control system, furnishing and using a pilot car is included in the various items of the work involved in applying the seal coat. If test results for the screenings grading do not comply with specifications, you may remove the seal coat represented by these tests or request that it remain in place with a payment deduction. The deduction is $1.75 per ton for the screenings represented by the test results. 391

3 If asphaltic emulsion seal coat with screenings does not comply with the cleanness value specifications, you may request that the seal coat remain in place with a pay deduction corresponding to the cleanness value shown in the following table: Asphaltic Emulsion Seal Coat Cleanness Value Deductions Cleanness value Deduction 80 or over None 79 $2.00 /ton $4.00 /ton $6.00 /ton If polymer modified asphaltic emulsion seal coat with screenings does not comply with the specifications for cleanness value you may request that the seal coat remain in place with a pay deduction corresponding by the cleanness value shown in the following table: Polymer Modified Asphaltic Emulsion Seal Coat Cleanness Value Deductions Cleanness value Deduction 86 or over None $2.20/ton $4.40/ton $6.60/ton If test results for polymer modified asphaltic emulsion aggregate grading and cleanness value test results do not comply with the specifications, all deductions are made. A test for asphaltic emulsion (polymer modified) represents the smaller of 55 tons or 1 day's production. A test for the screenings grading or cleanness value represents the smaller of 300 tons or 1 day's production. The Department does not adjust the unit price for an increase or decrease in the sand cover for the flush coat quantity. The Department does not adjust the unit price for an increase or decrease in the asphaltic emulsion (fog seal coat) quantity. The payment deduction for noncompliant modified emulsion is based on the total pay factor value determined from the table titled, "Polymer Modified Asphaltic Emulsion Pay Factor Deduction." You must remove modified emulsion seal coat with a pay factor value greater than 20. You may request seal coat with noncompliant modified emulsion to remain in place with a pay deduction for the total pay factor value shown in the following table: Polymer Modified Asphaltic Emulsion Pay Factor Deductions Total pay factor Deduction value 0 none 1 2 $5.00/ton 3 5 $10.00/ton 6 9 $15.00/ton $25.00/ton $50.00/ton 37-3 SLURRY SEAL AND MICRO-SURFACING GENERAL A Summary Section 37-3 includes specifications for applying slurry seal and micro-surfacing. 392

4 Slurry seal includes applying a mixture of asphaltic emulsion or polymer modified asphaltic emulsion, aggregate, set-control additives, and water spread on a surface or pavement. Micro-surfacing includes applying a mixture of micro-surfacing emulsion, water, additives, mineral filler, and aggregate spread on pavement B Definitions Reserved C Submittals C(1) General The testing laboratory must sign the original laboratory report and mix design. If the mix design consists of the same materials covered by a previous laboratory report, you may submit the previous laboratory report, which must include material testing data performed within the previous 12 months for authorization. If requesting substitute materials, submit a new laboratory report and mix design at least 7 days before starting placement C(2) Slurry Seal Submit a laboratory report of test results and a proposed mix design 7 days before starting placement of slurry seal. The report and mix design must include the specific materials to be used. The laboratory report must include: 1. Test results used in the mix design 2. Proportion of the following material based on the aggregate's dry weight: 2.1. Aggregate 2.2. Filler determined from tests, minimum and maximum 2.3. Water, minimum and maximum 2.4. Asphalt solids content 2.5. Set control agent 3. Comparison of slurry seal test results to the specified values Each day, submit moisture data for the aggregate collected every 2 hours when you are unable to maintain the moisture content to within a maximum daily variation of ± 0.5 percent C(3) Micro-surfacing Submit a laboratory report of test results and a proposed mix design 10 days before starting placement of micro-surfacing. The report and mix design must include the specific materials to be used and show a comparison of test results and specifications. Submit a certificate of compliance with each shipment of micro-surfacing emulsion as specified for asphaltic emulsion in section B. Before micro-surfacing activities start, submit the name of a person authorized to communicate with the Engineer about days when unsuitable weather conditions prevent micro-surfacing. The mix design report must include: 1. Test results used in the mix design 2. Proportions of the following material based on the aggregate's dry weight: 2.1. Aggregate 2.2. Water, minimum and maximum 2.3. Additives 2.4. Mineral filler, minimum and maximum 2.5. Micro-surfacing emulsion residual asphalt content, minimum and maximum 3. Recommended changes to the following proportions based on heating the mixture to 100 degrees F and mixing for 60 seconds: 3.1. Water 3.2. Additives 393

5 3.3. Mineral filler Do not recommend these changes when nighttime applications are specified or when atmospheric temperatures below 90 degrees F are forecast for daytime applications. 4. Comparison of each individual material's test results to its specified values. 5. Quantitative moisture effects on the aggregate's unit weight determined under ASTM C 29M D Quality Control and Assurance D(1) General Your laboratory must be able to perform International Slurry Surfacing Association tests and mix designs D(2) Slurry Seal Calibrate each truck mounted mixer-spreader used in the presence of the Engineer. Calibration must comply with California Test 109. Calibrate the adjustable cut-off gate settings of each mixer-spreader truck on the project to achieve the correct delivery rate of aggregate and emulsion per revolution of the aggregate feeder in compliance with California Test 109. Checks must be performed for each aggregate source using an approved California Test 109 vehicle scale. Individual checks of the aggregate belt feeder's delivery rate to the pugmill mixer must not vary more than 2 percent from the average of 3 runs of at least 3 tons each. Individual checks of the emulsion pump's delivery rate to the pugmill mixer must not vary more than 2 percent from the average of 3 runs of at least 500 gal each. Measure aggregate moisture every 2 hours during slurry seal placement or maintain the moisture content within a maximum daily variation of ± 0.5 percent D(3) Micro-surfacing Calibrate each truck-mounted mixer-spreader used in the presence of the Engineer. Notify the Engineer at least 5 business days before calibrating. Calibration must comply with the Department's Material Plant Quality Program. If the Department authorizes a truck-mounted mixer-spreader, its calibration is valid for 6 months provided you: 1. Use the same truck verified with a unique identifying number 2. Use the same materials in compliance with the authorized mix design 3. Do not perform any repair or alteration to the proportioning systems Before using a variable-rate emulsion pump, the pump must be calibrated and sealed in the calibrated condition under the Department's Material Plant Quality Program. For the aggregate belt feeder, the delivery rate for any individual check run must not deviate more than 2 percent from the average of the rates of 3 runs of at least 3 tons each. For the emulsion pump, the delivery rate for any individual check run must not deviate more than 2 percent from the average of the rates of 3 runs of at least 300 gallons each D(4) Mix Design D(4)(a) General Reserved D(4)(b) Slurry Seal The slurry seal mix design must comply with the requirements shown in the following table: 394

6 Slurry Seal Mix Design Requirements Properties International Specification Slurry Surfacing Association test method Consistency, mm, max Technical 30 Bulletin 106 Wet stripping Technical Pass Bulletin 114 Compatibility Technical Pass a Bulletin 115 Cohesion test b, kg-mm within Technical hour, min Bulletin 139 Wet track abrasion, g/m 2,, max Technical Bulletin a Mixing test must pass at the maximum expected air temperature at the job site during placement. b Using project source aggregate, asphaltic emulsion, and setcontrol agents, if any. The mix design must have the percent of asphaltic emulsion, based on percentage by weight of the dry aggregate, within the ranges shown in the following table: Asphaltic Emulsion Percentage Aggregate type Range I II III The Engineer determines the exact percentage based on the design asphalt binder content and the asphalt solids content of the asphaltic emulsion furnished Aggregate type is described in section A D(4)(c) Micro-surfacing Micro-surfacing mix design must have the material proportion limits shown in the following table: Micro-surfacing Mix Design Proportion Limits Material Proportion limits Micro-surfacing % of aggregate dry weight emulsion residual asphalt Water and No limit additives Mineral filler 0 3% of aggregate dry weight The micro-surfacing mix design must have the properties as specified in the following table: 395

7 Micro-surfacing Mix Design Tests Property International Specification Slurry Surfacing Association test method Wet 30 minute (set), min, 60 minute (traffic), Technical Bulletin min, kg-cm Excess asphalt, max, g/m2 Technical 540 Bulletin 109 Wet stripping, min, % Technical 90 Bulletin 114 Wet track abrasion loss Technical 6-day soak, max, g/m2 Displacement Lateral, max, % Specific gravity after 1000 cycles of 57 kg, max Classification compatibility, min, grade points Mix 25 C, min Bulletin Technical Bulletin 5 147A 2.10 Technical Bulletin 144 (AAA, BAA) 11 Technical Controllable to 120 Bulletin 113 seconds MATERIALS A General Aggregate must have the following gradation as determined under California Test 202: Aggregate Grading Percentage passing by aggregate type Sieve sizes I II III 3/8" No No No No No Aggregate must be rock dust or sand such as plaster sand. Aggregate larger than the no. 50 sieve must be 100 percent crushed rock. Aggregate must be free from vegetable matter, deleterious substances, caked or clay lumps, and oversized particles B Slurry Seal B(1) General Reserved B(2) Aggregate If the specific gravities differ by 0.2 or more, California Test 202 is replaced with California Test 105 for blends of different aggregates. Aggregate for slurry seal must have the quality characteristics as specified in the following table: 396

8 Quality characteristic Sand equivalent, min Durability index, min Aggregate Quality Test method California Test 217 California Test 229 Specification by aggregate type I II III Each day's aggregate moisture content measurements must not vary more than ±0.5 percent B(3) Asphaltic Emulsion B(3)(a) General Asphaltic emulsion must be either Grade QS1h anionic or Grade CQS1h cationic. Water must not allow separation of the asphaltic emulsion from the emulsion before you place the slurry seal. You may use a set-control agent that does not adversely affect the slurry seal B(3)(b) Polymer Modified Asphaltic Emulsion Polymer modified asphaltic emulsion must: 1. Consist of a polymer mixed with a bituminous material uniformly emulsified with water and an emulsifying or stabilization agent 2. Use either neoprene polymer or butadiene and styrene copolymer. The polymer must be homogeneous and milled into the asphaltic emulsion at the colloid mill. 3. Polymer modified asphaltic emulsion must be Grade PMCQS1h cationic and have the values of the properties shown in the following table: Polymer Modified Asphaltic Emulsion Property Test method Value Min Max Tests on emulsion: Saybolt Furol 25 AASHTO T C, SFS a Sieve test, % AASHTO T Storage stability, 1 day, % AASHTO T Residue by evaporation, % California Test Particle charge AASHTO T 59 Positive Tests on residue by evaporation test Penetration, 25 C AASHTO T Ductility, 25 C, mm AASHTO T Torsional recovery, % California Test or Polymer content, % California Test Note: SFS means Saybolt Furol seconds Sampling must comply with section C Micro-surfacing C(1) General Reserved 397

9 C(2) Aggregate If you blend aggregate from different sources, each source's aggregate must comply with the aggregate specifications except grading. Aggregate for micro-surfacing excluding mineral filler must have the quality characteristics as specified in the following table: Micro-surfacing Aggregate Quality characteristic Test method Sand equivalent, min California Test 217 Durability index, min California Test 229 Percentage of crushed California Test particles, min a 205 Los Angeles Rattler Loss at 500 revolutions, max b California Test 211 Specification % 35% a Crushed particles must have at least 1 fractured face. b California Test 211 must be performed on the aggregate before crushing C(3) Micro-surfacing Emulsion Micro-surfacing emulsion must be a homogeneous mixture of asphalt, polymer, and emulsifier solution. Add polymer modifier to asphalt or emulsifier solution before emulsification. Polymer solids must be a minimum 3 percent by weight of the micro-surfacing emulsion's residual asphalt. Micro-surfacing emulsion must have the values of the properties as specified in the following table: Micro-surfacing Emulsion Property Test method Value Saybolt Furol 25 AASHTO T seconds C, SFS a Sieve test, max AASHTO T % Settlement, 5 days, max b ASTM D 244 5% Storage stability, 1 day, max AASHTO T 59 1% Residue by evaporation, min California Test % a SFS means Saybolt Furol seconds b Waived if used within 48 hours of shipment. The micro-surfacing emulsion's residue by evaporation must have the values of the properties shown in the following table: 398

10 Micro-surfacing Emulsion Residue By Evaporation Property Test method Value 20 ºC, 10 rad/sec, AASHTO T 315 Report only MPa 25 ºC AASHTO T Phase 50 C, 10 AASHTO T 315 Report only rad/sec, PA (maximum) - PA base Softening point, min, ºC AASHTO T C, MPa, and M-value AASHTO T 313 Report only C(4) Mineral Filler If portland cement is used as mineral filler, it must be any combination of Type I, Type II, or Type III cement CONSTRUCTION A General Before applying slurry seal or micro-surfacing, cover manholes, valve and monument covers, grates, or other exposed facilities located within the area of application, using a plastic or oil resistant construction paper secured by tape of adhesive to the facility being covered. Reference the covered facilities with a sufficient number of control points to relocate the facilities after the application of the seal coat. In areas inaccessible to spreading equipment, spread the slurry seal or micro-surfacing mixture with hand tools or other authorized methods. If placing with hand tools, first lightly dampen the area. Do not handle or shift the material B Proportioning B(1) General The Engineer determines the asphalt distribution under California Test 310. The bitumen ratio, in kilograms of asphalt per 100 kg of dry aggregate, must not vary more than ±0.5 kg of asphalt from the determined amount B(2) Slurry Seal Proportion slurry seal ingredients in compliance with the authorized mix design. Proportion and blend different aggregate types before adding other ingredients. After proportioning, the slurry seal mixture must be workable and permit traffic within 1 hour after placement without occurrences of bleeding, raveling, separation or other distresses. None of the same occurrences must be present 15 days after placing the slurry seal B(3) Micro-surfacing Proportion the micro-surfacing materials using the authorized mix design. Field conditions may require adjustments during construction. Obtain authorization before adjusting proportions C Mixing and Spreading Equipment C(1) General Mixing and spreading equipment for slurry seal and micro-surfacing must proportion asphaltic emulsion, water, aggregate, and any set-control additives by volume and mix them in continuous pugmill mixers. Continuous pugmill mixers must be of adequate size and power for the type of materials to be mixed C(2) Truck Mounted Mixer Spreaders Truck mounted mixer spreaders must comply with the following: 1. Rotating and reciprocating equipment must be covered with metal guards. 399

11 2 Proportion aggregate using a belt feeder with an adjustable cutoff gate. The height of the gate opening must be determinable. 3. The belt feeder must have a depth monitor device. The depth monitor device must automatically shut down power to the belt feeder whenever the aggregate depth is less than 70 percent of the target depth. 4. A separate monitor device must detect the revolutions of the belt feeder. This device must automatically shut down power to the belt feeder if it detects no revolutions. If the belt feeder is an integral part of the equipment's drive chain, the monitor device is not required. 5. The aggregate belt feeder must be connected directly to the drive on the emulsion pump. The aggregate feeder drive shaft must have a revolution counter reading the nearest 0.10 revolution for micro-surfacing, and nearest 1 revolution for slurry seal. 6. Emulsion storage must be equipped with a device that automatically shuts down power to the emulsion pump and aggregate belt feeder when the level of stored emulsion is lowered. To allow for normal fluctuations, there may be a delay of 3 seconds between detection of low emulsion storage levels or low aggregate depths and automatic power shut down. 7. Emulsion storage must be located immediately before the emulsion pump. 8. The emulsion storage tank must have a temperature indicator at the pump suction level. The indicator must be accurate to ±5 degrees F. 9. No-flow and revolution warning devices must be in working condition and comply with California Test 109. Low-flow indicators must be visible while walking alongside the equipment C(3) Continuous Self-Loading Mixing Machine Continuous self-loading mixing machines must be automatically sequenced and self-propelled. The mixing machine must deliver the materials to a double shafted mixer and discharge the mixed product on a continuous flow basis. The mixing machine must have sufficient storage capacity to maintain a continuous supply of materials to the proportioning controls. The mixing machine must be self-loading without interrupting placement. The mixing machine operator must have full control of forward and reverse speeds during placement C(4) Slurry Seal Equipment C(4)(a) General Introduce emulsion into the mixer with a positive displacement pump. If you use a variable-rate pump, the adjusting unit must be sealed in its calibrated position. Introduce water into the mixer with a meter that measures gallons. Identifying numbers for equipment must be at least 2 inches high and located on the front and rear of the vehicle C(4)(b) Spreader Box Spread the slurry mixture with a spreader box that complies with the following: 1. Capable of spreading a lane width 2. Equipped with material such as flexible rubber belting on each side and in contact with the pavement to prevent loss of slurry from the box 3. If wider than 7.5 feet, a spreader box equipped with a means, such as baffles or reversible motordriven augers, to uniformly apply slurry seal on superelevated sections and shoulder slopes 4. Equipped with rear flexible strike-off blades making close contact with the pavement and adjustable to various crown shapes in order to apply a uniform slurry seal 5. Equipped with flexible drags attached to the rear and cleaned daily and changed if longitudinal scouring occurs 6. Clean and free of slurry seal or emulsion at the start of each work shift C(5) Micro-surfacing Equipment C(5)(a) General Choose a continuous self-loading mixing machine or truck mounted mixer-spreader. Proportion micro-surfacing emulsion using a positive displacement pump. 400

12 Identifying numbers for equipment must be at least 3 inches high and located on the front and rear of the vehicle C(5)(b) Spreader Box The spreader box must be capable of spreading the micro-surfacing a minimum of 12 feet wide and preventing the loss of micro-surfacing. Spreader boxes over 8 feet in application width must have a device, such as baffles or reversible motor driven augers, to ensure uniform application on superelevated sections and shoulder slopes. Clean micro-surfacing and micro-surfacing emulsion from the spreader box before each work shift. The spreader box must have a series of strike-off devices at its rear. The leading strike-off device must be: 1. Fabricated of a suitable material such as steel or stiff rubber 2. Designed to maintain close contact with the pavement during spreading 3. Capable of obtaining the specified thickness 4. Capable of being adjusted to the various pavement cross sections The final strike-off device must be: 1. Fabricated of flexible material that produces a uniform texture in the finished surface 2. Cleaned daily and changed if longitudinal scouring occurs in the micro-surfacing Do not use flexible drags attached to the rear of the spreader box C(5)(c) Shoulder Equipment Spread micro-surfacing on shoulders with a device such as an edge box that forms clean and straight joints and edges C(5)(d) Scratch Course Box Spread scratch course with the same type of spreader box used to spread micro-surfacing except use an adjustable steel strike-off device instead of a final strike-off device C(5)(e) Wheel Path Depression (Rut) Box Wheel path depression (rut) boxes must have adjustable strike-off devices between 5 and 6 feet wide that regulate depth. The rut box must also have devices such as hydraulic augers capable of: 1. Moving the mixed material from the rear to the front of the filling chamber 2. Guiding larger aggregate into the deeper section of the wheel path depression 3. Forcing the finer material towards the outer edges of the spreader box D Placing D(1) General If truck-mounted mixer-spreaders are used, keep at least 2 operational spreaders at the job site during placement. In areas inaccessible to spreading equipment, spread the slurry seal or micro-surfacing mixture with hand tools. If placing with hand tools, first lightly dampen the area. Do not handle or shift the mixture D(2) Surface Preparation D(2)(a) General Before you place slurry seal or micro-surfacing, clean the pavement surface. Remove loose particles of extraneous materials, including paving and dirt. Use any nondestructive method, such as flushing or sweeping D(2)(b) Slurry Seal If slurry seal operations affect access to public parking, residential property, or commercial property, notify residents, businesses, and local agencies at least 24 hours before starting activities. The notice must: 401

13 1. Describe the work to be performed 2. Detail streets and limits of activities 3. Indicate work hours 4. Be authorized Before starting slurry seal activities, post signs at 100-foot intervals on the affected streets. Signs must display "No Parking Tow Away." Signs must state the day of the week and hours parking or access will be restricted. Within 1 hour after placement, slurry seal must be set enough to allow traffic without pilot cars. Slurry seal must not exhibit distress from traffic such as bleeding, raveling, separation or other distresses D(2)(c) Micro-surfacing D(2)(c)(i) General You may fog the roadway surface with water ahead of the spreader box. The fog spray must be adjusted for pavement: 1. Temperature 2. Surface texture 3. Dryness D(2)(c)(ii) Repair Wheel Path Depression If repair wheel path depression is specified, fill wheel path depressions and irregularities with microsurfacing material before spreading micro-surfacing. If the depressions are less than 0.04 foot deep, fill with a scratch course. If the depressions are 0.04 foot deep or more, fill the depressions using with a wheel path depression (rut) box. Spread scratch course by adjusting the steel strike-off of a scratch course box until it is directly in contact with the pavement surface. Spread micro-surfacing with a rut box leaving a slight crown at the surface. Use multiple applications to fill depressions more than 0.12 foot deep. Do not apply more than 0.12 foot in a single application. Allow traffic to compact each filled wheel path depression for a minimum of 12 hours before placing additional micro-surfacing D(3) Test Strip D(3)(a) General Reserved D(3)(b) Slurry Seal Test strip does not apply to slurry seal D(3)(c) Micro-surfacing Reserved D(4) Placement D(4)(a) General Reserved D(4)(a)(i) General Longitudinal and transverse joints must be: 1. Uniform 2. Straight 3. Neat in appearance 4. Butt-type joints 5. Without material buildup 6. Without uncovered areas 402

14 Place longitudinal joints: 1. On centerlines, lane lines, edge lines, or shoulder lines 2. With overlaps not more than 3 inches Set the leading edge of roofing felt on transverse joints to create a straight butt joint with the next application when the roofing felt is removed D(4)(a)(ii) Weather Conditions Only place slurry seal or micro-surfacing if both the pavement and air temperatures are at least 50 degrees F and rising. Do not place slurry seal or micro-surfacing if either the pavement or air temperature is below 50 degrees F and falling. The expected high temperature must be at least 65 degrees F within 24 hours after placement. Do not place slurry seal or micro-surfacing if rain is imminent or the air temperature is expected to be below 36 degrees F within 24 hours after placement D(4)(a)(iii) Unsuitable Day The Engineer may notify you of unsuitable conditions before 4:00 p.m. on the day before your 1st intended working day to place slurry seal or micro-surfacing. After you have started slurry seal or microsurfacing placement activities, the Engineer has until 4:00 p.m. on the day before the next working day to give you an unsuitable day notice. If the Engineer gives you an unsuitable day notice (1) do not place slurry seal or micro-surfacing on the next working day and (2) the Department does not pay for return, storage or disposal of materials delivered to the job site and the time of workers. If maintenance of previously applied slurry seal or micro-surfacing can be performed, continue to perform maintenance. In the absence of an unsuitable day notice or if the Engineer gives notice after 4:00 p.m. of the previous day: 1. Comply with specifications restricting slurry seal or micro-surfacing application. 2. Return, store, or dispose of any slurry seal or micro-surfacing materials you deliver to the job site when conditions are unsuitable. 3. The Department adjusts payment for the return, storage or disposal of materials delivered to the job site. 4. The Department adjusts payment for the show-up time of workers who would have applied slurry seal or micro-surfacing. 5. Payment of materials and labor will be determined under section , except markups are not added. It is a nonworking day if the slurry seal or micro-surfacing work is the controlling operation and (1) the Engineer provides you timely notice of an anticipated unsuitable day or (2) there is untimely or no notice and conditions are unsuitable for placing slurry seal or micro-surfacing. If you fail to submit the name of a person authorized to communicate with the Engineer about unsuitable day notices, the specifications for payment do not apply D(4)(b) Slurry Seal Spread slurry seal uniformly within the specified rate. Do not spot, rehandle, or shift the mixture. If there is a bid item for tack coat, coat the pavement surface with an SS or CSS grade asphaltic emulsion mixed with additional water. The ration of water to asphaltic emulsion must be 3 to 1. Apply the tack coat at a rate from 0.08 to 0.15 gal/sq yd. The exact rate must be authorized. The Engineer determines the exact spread rate for slurry seal. The completed rate must be within 10 percent of the Engineer's determined spread rate. The slurry seal spread rates must be within the ranges shown in the following table: 403

15 Slurry Seal Spread Rates Type of Range aggregate (lb of dry aggregate/sq yd) I 8 12 II III Longitudinal joints must correspond with lane lines. You may request other longitudinal joint patterns if they do not adversely affect the slurry seal. Spread slurry seal in full lane widths. Do not overlap slurry seal between adjacent lanes more than 3 inches. Use a material, such as building paper at transverse joints and over previously placed slurry seal to prevent double placement. Remove the material after use. Use hand tools to remove spillage. The finished surface must be smooth. The mixture must be uniform and homogeneous after spreading and there must not be separation of the emulsion and aggregate after setting. Protect the slurry seal from damage until it has cured and will not adhere or be picked up by vehicle tires D(4)(c) Micro-surfacing D(4)(c)(i) General The Engineer determines the exact spread rate for micro-surfacing, The completed spread rate must be within 10 percent of the Engineer's determined spread rate. The micro-surfacing spread rates must be within the ranges shown in the following table: Micro-surfacing Spread Rates Micro-surfacing type Location Range (lb of dry aggregate/sq yd) Type II Full lane width Type III a Full lane width Type III b Full lane width a Over asphalt concrete pavement b Over concrete pavement and concrete bridge decks Spread micro-surfacing either in the direction of traffic or in the opposite direction. Keep hand tools available to remove spillage D(4)(c)(ii) Joints The maximum difference between the pavement surface and the bottom edge of a 12-foot straightedge placed perpendicular to the joint must be: foot for longitudinal joints foot for transverse joints D(4)(c)(iii) Finished Surface Finished micro-surfacing must be free of irregularities such as scratch or tear marks. You may leave up to 4 marks that are 1/2 inch or more wide and 6 inches or more long per 75 linear feet of micro-surfacing placed. Do not leave any marks that are over 1 inch wide or 6 inches long. Sweep the micro-surfacing 24 hours after placement without damaging the micro-surfacing. For 5 days afterward, sweep the micro-surfacing daily. 404

16 D(4)(c)(iv) Repair of Early Distress If bleeding, raveling, delaminating, rutting, or washboarding occurs after placing the micro-surfacing, make repairs using an authorized method PAYMENT A General If tack coat is specified, it will be measured under section B Slurry Seal Slurry seal is measured by combining the weight of the aggregate and asphaltic emulsion. The weight of added water and set-control additive are not measured. If test results for aggregate grading or sand equivalent do not comply with the specifications, you may remove the installed slurry seal represented by the test results or request it remain in place with a payment deduction. The deduction is $1.75 per ton. If test results for both aggregate grading and sand equivalent do not comply with the specifications, both deductions are made. An aggregate grading or cleanness value test represents 300 tons or 1 day's production, whichever is less C Micro-surfacing Micro-surfacing is measured by combining the weight of the aggregate and micro-surfacing emulsion, including test strips. The weight of added water and set-control additives are not measured for payment. If test results for aggregate grading or sand equivalent do not comply with the specifications, you may remove the installed micro-surfacing represented by the test results or request it remain in place with a payment deduction. The deduction is $2.00 per ton. If test results for both aggregate grading and sand equivalent do not comply with the specifications, both deductions are made PARKING AREA SEALS GENERAL A Summary Section 37-4 includes specifications for applying a mixture of asphaltic emulsion, aggregate, polymer, and water spread on a surface or pavement B Definitions Reserved C Submittals At least 15 days before starting placement, submit samples of the aggregate to be used. The samples must be processed the same way as the aggregate to be used in the work. At least 10 days before starting placement, submit the name of a laboratory to perform testing and mix design. At least 7 days before starting placement, submit a laboratory report of test results and a proposed mix design. The report and mix design must include the specific materials to be used and show a comparison of test results and specifications. The mix design report must include the amount of water allowed to be added at the job site. The laboratory performing the tests must sign the original laboratory report and mix design. If the mix design consists of the same materials covered by a previous laboratory report, you may submit the previous laboratory report which must include material testing data performed within the previous 12 months for authorization. If you request substitute materials, submit a new laboratory report and mix design at least 10 days before starting placement. At least 10 days before use, submit the manufacturer's product data for oil seal primer and polymer. 405

17 Submit a certificate of compliance for the parking area seal material D Quality Control and Assurance Sample the undiluted parking area seal material MATERIALS A General Aggregate must be clean, hard, durable, uncoated, and free from organic and deleterious substances. One hundred percent of the aggregate must pass the no. 16 sieve. Asphaltic emulsion must be either Grade SS1h or CSS1h. Asphaltic emulsion must comply with section 94, except in Tables 1 and 2, the values for penetration at 25 degrees C for tests on residue from distillation must be from 20 to 60. You may use clay-stabilized emulsion with a solids content not less than 45 percent by weight. Polymer must be either neoprene, ethylene vinyl acetate, or a blend of butadiene and styrene. Oil seal primer must be a quick-drying emulsion with admixtures. Oil seal primer must be manufactured to isolate the parking area slurry seal from pavement with residual oils, petroleum grease, and spilled gasoline. Crack sealant must comply with section Water must be potable and not separate from the emulsion before the material is placed B Mix Design The proposed mix design for parking area seals must have the values of the properties shown in the following table: Parking Area Seal Mix Design Requirements Requirement Property Test method Min Max Mass per liter ASTM D kg Cone penetration, California Test mm % Nonvolatile % Nonvolatile ASTM D 2042 a soluble in triclorethylene Wet track abrasion, ASTM D g/m 2 Dried film color Black Viscosity ASTM D KU b a Weigh 10 g of homogenous product into a previously tared, small ointment can. Place in a constant temperature oven at 165 ± 5 C for 90 ± 3 minutes. Cool, reweigh, and calculate nonvolatile components as a percent of the original weight. b Krebs units Parking area seals must contain a minimum of 2 percent polymer by volume of undiluted asphaltic emulsion CONSTRUCTION A General Reserved 406

18 B Proportioning Mix parking area seal ingredients in a central plant. The plant must include mechanical or electronic controls that consistently proportion the ingredients. Mix asphaltic emulsion with the other ingredients mechanically. Store the parking area seal in a tank equipped with mixing or agitation devices. Keep stored materials thoroughly mixed. Protect stored materials from freezing conditions C Surface Preparation If cracks in the existing pavement are from 1/4 to 1 inch wide, treat the cracks under section Do not place the parking area seal until the Engineer determines that the crack treatment is cured. If cracks in the existing pavement are greater than 1 inch wide, the Engineer orders the repair. After any crack treatment and before placing parking area seal, clean the pavement surface, including removal of oil and grease spots. Do not use solvents. If cleaning the pavement with detergents, thoroughly rinse with water. Allow standing water to dry before placing parking area seal. You must seal oil and grease spots that remain after cleaning. Use an oil seal primer and follow the manufacturer's instructions. If the existing pavement has oil and grease spots that do not come clean and sealing is insufficient, the Engineer orders the repair of the pavement. This work is change order work D Placement Do not place parking area seal when the ambient temperature is less than 55 degrees F or the surface temperature is less than 60 degrees F. Do not place seal within 24 hours of rain or within 24 hours of forecast rain or freezing temperatures. Request that the Engineer shut off the irrigation control system at least 5 days before placing the seal. Do not water plants adjacent to the seal at least 24 hours before and after the seal coat placement. Add polymer at the job site in the Engineer's presence. If adding water at the job site based on the manufacturer's recommendations for consistency and spreadabilty, do not exceed 15 percent by volume of undiluted asphaltic emulsion. Before placing the parking area seal, dampen the pavement surface using a distributor truck. Place the seal on the damp pavement but do not place it with standing water on the pavement. Place the parking area seal in 1 or more application. The seal must be uniform and smooth, free of ridges or uncoated areas. If placing in multiple applications, allow the last application to thoroughly dry before the subsequent application. Do not allow traffic on the parking area seal for at least 24 hours after placement. Do not stripe the parking area seal until it is dry PAYMENT Parking area seal is measured by combining the weight of the aggregate and asphaltic emulsion. Added water and set-control additive are not measured CRACK TREATMENT GENERAL A Summary Section 37-5 includes specifications for treating cracks in asphalt concrete pavement, including shoulders. 407

19 B Definitions Reserved C Submittals Submit a certificate of compliance if your selected crack treatment material is on the Authorized Material List. The submittal must include: 1. Manufacturer's name 2. Production location 3. Product brand or trade name 4. Product designation 5. Batch or lot number 6. Crack treatment material type 7. Contractor or subcontractor name 8. Contract number 9. Lot size 10. Shipment date 11. Manufacturer's signature If your selected crack treatment material is not on the Authorized Material List submit a sample and test results from each batch or lot 20 days before use. Testing must be done by an authorized laboratory and test results must show compliance with the specifications. Test reports must include the information specified for the certificate of compliance submittal. Hot-applied crack treatment material samples must be 3 pounds minimum in a silicone release container. Cold-applied crack treatment material samples must be submitted in a minimum 2-quart plastic container. Submit the following with each delivery of crack treatment material to the job site: 1. Manufacturer's heating and application instructions 2. Manufacturer's MSDS 3. Name of the manufacturer's recommended detackifier D Quality Control and Assurance Hot-applied crack treatment material must be sampled at least once per project in the Engineer's presence. Collect two 3-pound minimum samples of crack treatment material from the dispensing wand into silicone release boxes. Submit 1 sample. Cold-applied crack treatment material must be sampled at least once per project in the Engineer's presence. Collect 2 samples of crack treatment material from the dispensing wand into 1-quart containers and submit 1 sample MATERIALS Crack treatment material must have the values of the properties shown in the following table: 408

20 Property a ASTM test method b Type 1 material Crack Treatment Material Type 2 material Type 3 material Type 4 material Type 5 material Softening point (min) D C 96 C 90 C 84 C 84 C Cone penetration at 77 F (max) D Resilience at 77 F, unaged, % D Flexibility c D C 0 C 0 C -11 C -28 C Tensile adhesion, %, (min) D Specific gravity (max) D Asphalt compatibility D 5329 Pass Pass Pass Pass Pass Sieve test (percent passing) See note d a Cold-applied crack treatment material residue collected under ASTM D 6943, Method B and sampled under ASTM D 140 must comply with the grade specifications. b Except for viscosity, cure each specimen at a temperature of 23 ± 2 C and a relative humidity of 50 ± 10 percent for 24 ± 2 hours before testing. c For the flexibility test, the specimen size must be 6.4 ± 0.2 mm thick by 25 ± 0.2 mm wide by 150 ± 0.5 mm long. The test mandrel diameter must be 6.4 ± 0.2 mm. The bend arc must be 180 degrees. The bend rate must be 2 ± 1 seconds. At least 4 of 5 test specimens must pass at the specified test temperature without fracture, crazing, or cracking. d For hot-applied crack treatment, dilute with toluene and sieve through a no. 8 sieve. For coldapplied crack treatment, sieve the product as-received through a no. 8 sieve. If the manufacturer provides a statement that added components passed the no. 16 sieve before blending, this requirement is void. Crack treatment material must be delivered to the job site with the information listed below. If crack treatment material is delivered to the job site in containers, each container must be marked with the following information. 1. Manufacturer's name 2. Production location 3. Product brand or trade name 4. Product designation 5. Crack treatment trade name 6. Batch or lot number 7. Maximum heating temperature 8. Expiration date for cold application only Hot-applied crack treatment must be delivered to the job site premixed in cardboard containers with meltable inclusion liners or in a fully meltable package. Cold-applied crack treatment must have a minimum shelf life of 3 months from the date of manufacture. Sand applied to tacky crack treatment material must be clean, free of clay, and have the following gradation: 409

21 Sand Gradation Sieve size Percent passing No No No CONSTRUCTION Treat cracks from 1/4 to 1 inch in width for the entire length of the crack. Fill or repair cracks wider than 1 inch as ordered. Filling cracks wider than 1 inch is change order work. For hot-applied crack treatment material rout cracks or saw cut to form a reservoir. Cracks must be clean and dry before treating. Before treating, blast cracks with oil-free compressed air at a pressure of at least 90 psi. If the pavement temperature is below 40 degrees F or if there is evidence of moisture in the crack, use a hot air lance immediately before applying crack treatment. The hot air lance must not apply flame directly on the pavement. Heat hot-applied crack treatment material in compliance with the manufacturer's instructions. Comply with the manufacturer's application instructions. Apply cold-applied crack treatment material with a distributor kettle, a piston, or a diaphragm barrel pump that can deliver from 50 to 75 psi. The application line must have a pressure gauge and a filter. The pressure in the application line must not exceed 20 psi. The pressure gauge must have a regulator. Use a high-pressure hose with a 1/2-inch National Pipe Tapered Thread (NPT) swivel connection and a dispensing wand. Apply crack treatment with a nozzle inserted into the crack. Fill the crack flush. If after 2 days the crack treatment is more than 1/4 inch below the specified level, the sealant fails or the crack re-opens, re-treat the crack. Immediately remove crack treatment material that is spilled or deposited on the pavement surface. Before opening to traffic, apply sand or the manufacturer's recommended detackifying agent to tacky crack treatment material on the traveled way. Sweep up excess sand before opening to traffic PAYMENT Crack treatment is measured by the lane-mile. A lane-mile consists of a paved lane and any adjacent shoulders. The Engineer determines the quantity paid from actual measurements along the edge of each paved lane parallel with the pavement centerline. 38 RESERVED 410